How to use this tool
Choose the source and target bases and enter a whole number without a 0x or 0b prefix. Digits above nine use A–Z. The converter validates every digit and uses integer arithmetic within the stated maximum absolute value of 9,007,199,254,740,991. Negative numbers use a leading minus sign, not a fixed-width two’s-complement representation.
Try these values
FF in base 16 converts to 255 in base 10 and 11111111 in base 2.
Common questions
Can I convert fractional digits?
No. This tool converts whole numbers only.
Does a negative result show two’s complement?
No. It keeps the leading minus sign. A fixed-width bit representation needs a width and a separate convention.
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